Dynamo-electric machine.



F. R. KUNKEL.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED JULY 6,1908.

1, 1 1 5,440. I Patented Oct. 27, 1914.

3 SHEBTS-SHEET l.

WITNESSES INVENTOR 0L1, QM

ATTORNEY F. R. KUNKEL.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED JULY6,1908

1,1 15,440. Patented 001;. 27, 1914.

3 SHBETS-SHEET 2.

WITNESSES: INVENTOR F. R. KUNKEL.

DYNAMO ELECTRIC MACHINE. APPLICATION FILED JULY 6, 1908.

Patented Oct. 27, 1914.

3 SHEETS-SHEET 3.

- I VEN 08 old. 2? 0 WITNESSES! ATTORNEY mgavzww' fecting ventilationand cooling thereof.

been effected in connection FRED R. KUN'KEL, OF EDGEVIOOD PARK,

OFFICE.

PENNSYLVANIA, ASSIGNOR, BY MESNE AS- PITTSBURGH, PENNSYLVANIA, ACORPORATION OF PENNSYLVANIA DYNAMO-ELECTRIC MACHINE.

Specification of Letters Patent.

Patented Oct. 27, 1914.

Application filed July 8, 1908. Serial No. M2178.

To aZZ whom it may comer/1.:

Be it known that I. Fnnn'I-t. KUNKEL, a citizen of the United States,and a resident of Edgewood Park, in the county of Allegheny and State ofPennsylvania, have invented a new. and useful improvement inDynamo-Electric Machines, of which the following is a specification.

My invention relates to dynamo-electr c machines. and particularly tomeans for et- The object of my invention is to so con struct and arrangethe parts of a dynamoelectric machine as to cause and permit moreeffective cooling and ventilation than has with machines heretoforeconstructed.

Figure 1 of the accompanying drawings is a view in longitudinal sectionand in side elevation of a machine constructed in accordance with thepresent invention. Fig. 52 is a longitudinal sectional view through aportion of another machine also embodying the invention, and Fig. 3 isview, in end elevation, of a rotatable member for the said machines.

The. machine comprises, as is usual, stationary and rotatable laminatedcore-members 1 and 2, the former of which is supported upon rods orbolts 3 and is mounted within an inclosin g casing 4% for the machine,annular passages being provided between the outer circumferential faceoi? the member and the casing. The stationary member is provided with awinding 6 that may be of any desired and suitable form.

The supporting spider for the rotatable core member 2 comprises a sleeve7 having radially projecting longitudinal ribs '7 upon which the corelamince are mounted, an outwardly projecting annular flange 8 at aconsiderable distance beyond one end of the core and radial vanes 9between the flange and the corresponding end of the core, all of saidspider parts constituting a one-piece integral structure for supportingthe core laminae and providing ventilating passages to dischargecurrents of air against the projecting ends of the stationary coils 6,and also 'cool the core 2. The vanes 9 also act as fan blades to causethe circulation of air through the ventilating passages during the 1operation of the machine.

When the rotatable member of the machine is in motion, the vanes 9 causea movement of air radially outward in the direction of the arrows 10,thus drawing air longitudinally through the passages provided in therotatable member by the ribs 7, as indicated by the arrows 11, andcausing drafts longitudinally through the passages 5 between thestationary core member and the casing in the in the passages in therotatable indicated by tween the ends of from those member, as thearrowsv 12, as well as bethe passages in the staopposite directiontionary and rotatable members at the end of the machine opposite thevanes 9, as indicated by the arrows 13. Thus, it is seen that the fromthe innermost heated portions of the circulation of air occurs throughand machine to the outermost portions, or adacent to the casing, conteri that the drafts of air ends of the coils 6.

While the invention is from which the heat veyed by the air is radiatedto the exor of the machine, it being noted further also pass between theparticularly adapted for employment in machines that are entirelyinclosed, very effective in structures, in which inwardly at one endthrough the as shown in Fig. 1, it is also machines having open the airmay be drawn winding at ing claim as my invention:

A rotatable member for dynamo-eleccomprising a core and a onehaving, asinthat constitute and an outflange constituta continuation of the bodyof the sleeve beyond the corresponding end of the core to deflect theair currents radially outward.

trio machines comprising A rotatable member for dynainoeleca core and aonepiece supporting structure having, as integral parts thereof, asleeve, longitudinal ribs, an outwardly pro ecting annular flange CODstituting a continuation of the body portion of the sleeve at one endand radial vanes disposed between the flange and the the core member.

. dynamo-electric machine comprising .ing ventilating passages of arotatable member ary coils.

stationary and rotatable members having laminated cores, an inclosingcasing therefor, and a longitudinally ribbed sleeve support for therotatable core member having an annular deflector at one endconstituting a continuation of the body portion of the sleeve support,whereby currents of air are caused to flow through the rotatable memberlongitudinally from one end thereof in contact with its core andradially outward at the other end and between and in vcontact with thestationary core and the 5. In a dynamo 4 electric machine, the

combination with a stationary member comprising a casing, a'core andcoils and having ventilating passages between the casing and the core,of a rotatable member having passages extending longitudinallythereventilating passages through the stationary the stationary member,and

b0 the rotatable member and the through and an annular deflector at oneend of the passages and constituting a continuation of the inner wallsthereof to deflect the air currents through the stationary ventilatingpassages in and means for causand between the coil spaces to the thestationary member, ing a circulation through said passages.

6. In a dynamo electric machine, the combination with a stationarymember comprising a casing, a core and coils having between the casingand the core, of a rotatable member having passages extendinglongitudinally therethrough 1 and an annular deflector at one endconstituting a continuation of the inner walls of said passages todeflect the air currents coil spaces to the passages in vanes disposedradially between one end of the core of ends of the passages in the saidmember.

In testimony ,Whereof, I have hereunto subscribed my name this 20th dayof June, 1908.

1' FR D R; KUNKEL.

Witnesses IV J. BnANsoN, BIRNEY HINES.

